A brief introduction to power banks

Power bank, mobile charger (power, charge, power bank, urine bag, nanny; It is a portable charger that can be carried by individuals and can store their own power, mainly for charging consumer electronic products such as handheld mobile devices (such as wireless phones and laptops), especially in situations where there is no external power supply. Its main components include: batteries used as energy storage, circuits to stabilize output voltages (DC-DC converters), and most of the power supplies with chargers used as built-in batteries for charging.